INVESTIGADORES
ARANGUREN mirta Ines
artículos
Título:
Resol-vegetable fibers composites
Autor/es:
C. N. ZÁRATE; ARANGUREN, MIRTA I.; REBOREDO, MARÍA M.
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Editorial:
Wiley
Referencias:
Lugar: NY; Año: 2000 vol. 77 p. 1832 - 1840
ISSN:
0021-8995
Resumen:
ABSTRACT: Vegetable fibers like cotton, sisal, and sugar cane bagasse have been used as
reinforcement in a polymeric matrix. Because of its low cost and affinity with lignocellulosic
fibers, a phenol-formaldehyde resin resol was selected as the matrix. Composites were
prepared by compression molding. The influence of fiber volume fraction-Vf-in flexural
properties and density of composites has been studied. Cotton and sugar cane bagasse
composites present a Vf value at which flexural strength and modulus are maxima.
However, sisal composites show a continuous rise in flexural strength and modulus as fiber
volume fraction increases, up to 76%, which is the highest concentration studied. Composites
made with raw cotton show the highest values of strength and stiffness. The actual
density of composites is always lower than theoretical density, due to the presence of voids.
Scanning Electron Microscopy reveals a good adhesion between fiber and matrix in the
composites. In addition, the flexural properties were analyzed with an efficiency criterion,
which relates strength and stiffness with density, and the values obtained were compared
with those corresponding to typical structural materials. © 2000 John Wiley & Sons, Inc. J Appl
Polym Sci 77: 18321840, 2000
Key words: resol composites; cotton fibers; sisal fibers; sugar cane bagasse